Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p31d..06m&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #P31D-06
Physics
5415 Erosion And Weathering, 5420 Impact Phenomena, Cratering (6022, 8136), 5470 Surface Materials And Properties, 5480 Volcanism (6063, 8148, 8450), 5494 Instruments And Techniques
Scientific paper
The High Resolution Imaging Science Experiment (HiRISE) on Mars Reconnaissance Orbiter (MRO) has acquired more than 7.8 Terapixels of Mars imaging since October 2006, covering less than 0.8% of the surface. Images are 5-6 km wide with 3-color coverage over the central 20%, and their scales usually range from 25-60 cm/pixel. More than 800 stereo pairs have been acquired and ~20 digital terrain models (DTMs) completed; these data have led to some of the most significant science results. New methods to measure and correct distortions due to pointing jitter facilitate topographic and change-detection studies at sub-meter scales. There are recent results concerning Noachian bedrock stratigraphy and megabreccia, fluvially- deposited fans in craters and in or near Valles Marineris, groundwater flow in fractures and porous media, quasi-periodic layering in polar and non-polar deposits, tectonic history of west Candor Chasm, geometry of clay-rich deposits near and within Mawrth Vallis, dynamics of flood lavas in the Cerberus Palus region, new evidence for pyroclastic deposits, columnar jointing in rapidly-cooled lava flows, recent collapse pits, evidence for water in well-preserved impact craters, newly-discovered large rayed craters, and glacial and periglacial processes. We are particularly interested in ongoing processes such as those driven by the wind, impact cratering, dust avalanches, icy avalanches on north polar scarps, relatively bright deposits on steep gullied slopes, and the especially dynamic seasonal processes over polar regions in the spring and summer. For landing sites (past, present, and future) HiRISE has acquired hundreds of large images and contributed to scientific and engineering studies.
McEwen Alfred S.
Team H. S.
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